Chlorine is the most popular treatment for keeping swimming pool water chemistry balanced because it's highly effective and relatively low cost

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How to maintain swimming pool water quality and chemistry

When chlorine is added to swimming pools, it dissolves and forms a weak acid called hypochlorous acid (HOCI), and then combines with oxygen to form hypochlorite (CIO). Together, these chemicals form free chlorine.

Chlorine can then break down the cell walls of microorganisms such as bacteria and algae. It then oxidises them, in other words, it enters the molecules of the microorganisms and destroys them from the inside out, killing or deactivating them.

How to use chlorine

Chlorine can be added to pool water in several ways, including powder, tablets and granules. Tablets can be added to a chlorine dispenser, in the pool’s swimmer basket or to an automatic chlorinator. Granules can be pumped directly into the pool water where they dissolve and are then distributed by the pool’s filtration system.

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